Agriculture & Biology
aluminum
12%
ash (inorganic matter)
28%
chromium
14%
groundwater
15%
highlands
64%
ions
10%
iron
52%
magnetite
100%
metals
53%
nickel
14%
organic acids and salts
13%
organic horizons
21%
organic soils
16%
polluted soils
14%
rocks
13%
sesquioxides
47%
slags
34%
smelters
94%
soil
35%
soil formation
20%
soil organic matter
26%
soil pH
13%
soil types
13%
solubility
12%
surface water
15%
water
5%
water quality
14%
Engineering & Materials Science
Acidity
8%
Aluminum oxide
5%
Ashes
12%
Biological materials
15%
Chromium
6%
Contamination
68%
Groundwater
6%
Ions
5%
Iron
63%
Magnetite
96%
Metals
45%
Nickel
5%
Organic acids
8%
Rocks
5%
Slags
11%
Soils
55%
Solubility
6%
Surface waters
8%
Tailings
7%
Water quality
7%
Watersheds
88%
Earth & Environmental Sciences
acidity
11%
ash
19%
chromium
10%
contaminated soil
10%
contamination
46%
groundwater
7%
ion
7%
iron
46%
magnetite
64%
metal
42%
nickel
10%
organic acid
12%
organic soil
12%
rock
5%
slag
22%
soil
30%
soil formation
13%
soil organic matter
22%
soil type
10%
solubility
9%
surface water
7%
tailings
11%
water
7%
water quality
7%
watershed
51%
Chemical Compounds
Filtration
61%
Groundwater
8%
Magnetite
72%
Metal
31%
Organic Acid
7%
Pedogenesis
15%
Slag
16%
Soil
59%
Soil Organic Matter
22%
Surface Water
8%